Craig L Nelson

US Patent:

7562833, Jul 21, 2009

Filed:

Dec 1, 2006

Appl. No.:

11/606958

Inventors:

Lee A. Perkins - Lowden WA, US
Craig Nelson - Walla Walla WA, US

Assignee:

Nelson Irrigation Corporation - Walla Walla WA

International Classification:

B05B 3/04

US Classification:

23922217, 23922211, 239498, 239505, 239DIG 11

Abstract:

A sprinkler including a sprinkler head incorporating a nozzle; a spool fixed to the sprinkler head in proximity to the nozzle; a cage assembly loosely mounted on the spool, the assembly including a distribution plate at a first end of the assembly downstream of the nozzle and a first magnet at a second opposite end of the assembly upstream of the spool; a mounting element fixed to the assembly between the first and second ends, an inner edge of the mounting element loosely confined between upper and lower flanges of the spool; and a second magnet fixed to the sprinkler head, axially between the spool and the first magnet.

US Patent:

8336788, Dec 25, 2012

Filed:

Aug 7, 2009

Appl. No.:

12/537690

Inventors:

Lee A. Perkins - Lowden WA, US
Craig B. Nelson - Walla Walla WA, US
Christina R. Butler - Clarkston WA, US

Assignee:

Nelson Irrigation Corporation - Walla Walla WA

International Classification:

B05B 1/28
B05B 15/04
B05B 3/00
B05B 15/06

US Classification:

239122, 2392885, 239124, 239210

Abstract:

A rotary sprinkler includes a housing supporting a nozzle and a nozzle tube, the nozzle tube located axially adjacent an orifice of the nozzle with an axial gap therebetween. A water-deflection plate assembly is carried by the nozzle tube for rotation relative to the nozzle tube. The housing is formed with an exterior substantially annular funnel surrounding the nozzle and forming a collection trough for collection of excess water, and the housing formed with one or more apertures directing excess water in the collection trough to an internal area surrounding the orifice to be aspirated through the gap into a stream of water emitted from the nozzle orifice and through the nozzle tube such that the excess water is distributed by the water-deflection plate along with water emitted from the nozzle orifice.

US Patent:

59283629, Jul 27, 1999

Filed:

Apr 29, 1997

Appl. No.:

8/841118

Inventors:

Louis A. Cardillo - Palo Alto CA
Sandro H. Pintz - Menlo Park CA
Craig A. Nelson - Aptos CA
Landau F. Edouard - San Jose CA

Assignee:

CagEnt Technologies, Inc. - Santa Clara CA

International Classification:

G06F 1100

US Classification:

713200

Abstract:

Authentication mechanism for interactive home entertainment systems using plug-in cards which do contain software as well as cards which do not contain software. A security bit stream is generated by circuitry on the card and checked by the base system while the system is operating, but only a single signal line of the interface is used for the bit stream. The card also includes a ROM which contains data to be downloaded to the base system. The ROM data is downloaded to the base system via the same signal line of the interface as the serial bit stream. The signal line is used for ROM data download while the base system asserts a "reset" signal, and is used to carry the serial bit stream for authentication purposes whenever the reset signal is negated.

US Patent:

58090061, Sep 15, 1998

Filed:

May 31, 1996

Appl. No.:

8/655961

Inventors:

Hedley C. Davis - Fremont CA
Craig A. Nelson - Aptos CA
Glenn J. Keller - Los Gatos CA

Assignee:

Cagent Technologies, Inc. - Redwood City CA

International Classification:

G11B 700

US Classification:

3692754

Abstract:

Copy-protected optical disk format, optical disk recording apparatus for creating disks having such formats and optical disk reading apparatus for reading disks having such formats and for determining whether the disks are authentic. In one aspect, an authentic optical disk has data bit indications along a spiral centerline of the disk, and these data bit indications define a radial wobble which has substantially greater energy at a predefined frequency f. sub. CPW (such as f. sub. CC /392) than at a frequency of f. sub. CC /196, where f. sub. CC is the spatial channel clock frequency. In another aspect, an authorized optical disk has data bit indications along a substantially spiral centerline of the disk, according to a channel clock whose frequency varies across the disk. The disk further has stored thereon an indication of the number of such channel clock cycles which occur along a predetermined test segment of the centerline, optionally together with a pointer to the test segment. Since normal data stream copying techniques do not copy the exact channel clock rates on the disk, and since the copying equipment will inherently introduce its own channel clock variations across the resulting disk, the predetermined test segment on the copy will not have the number of channel clocks as that specified by the data indicating the number of channel clock cycles to expect along the test segment.

US Patent:

51135116, May 12, 1992

Filed:

Jun 2, 1989

Appl. No.:

7/360357

Inventors:

Craig Nelson - Redwood City CA
Javier Solis - Santa Clara CA
David L. Needle - Alameda CA

Assignee:

Atari Corporation - Sunnyvale CA

International Classification:

G06F 1202
G06F 1200

US Classification:

395425

Abstract:

A system (60) for predicting CPU addresses includes a CPU (34) connected by bus (62) to page mode address predicting circuit (64). The page mode address predicting circuit (64) is connected to memory arbitration circuits (66) by bus (68). The memory arbitration circuits (66) are connected to RAM (42) by address, data and control busses (44), (46) and (48). The CPU (34), page mode address predicting circuit (64) and the memory arbitration circuits 66 are contained in a microprocessor integrated circuit (32). The page mode predicting circuit 64 examines signals from the CPU (34) to be supplied to the data bus (46) at the time of a SYNC pulse. This operation results in examination of the first byte of a CPU instruction to determine how many of the following memory accesses will be able to be carried out in high speed mode. If it is determined that the next memory access will be able to be carried out in the high speed mode, then the next memory cycle is performed using a high speed access mode of the RAM (42), e. g. page mode access.

US Patent:

20160201743, Jul 14, 2016

Filed:

Jul 1, 2015

Appl. No.:

14/789415

Inventors:

- Walla Walla WA, US
Lee A. Perkins - Lowden WA, US
Craig B. Nelson - Walla Walla WA, US
Riley D. Greenwood - Walla Walla WA, US

International Classification:

F16D 57/00
F16D 57/02

Abstract:

A rotational speed control device maintains a shaft rotation speed. The device includes a housing containing a viscous fluid and a shaft disposed in the housing and rotatable relative to the housing. A rotor is coupled with the shaft for rotation in the viscous fluid. In one arrangement, the rotor is axially displaceable along the shaft between a low-shear position and a high-shear position. A spring mechanism is disposed in the housing and biases the rotor toward the low-shear position. In another arrangement, the rotor may be designed to cooperate with the housing or other nonrotating features within the housing to vary a shear gap according to radially expanding components of the rotor. The rotor, housing and spring mechanism can be designed to cooperate to create large changes in braking torque in response to small changes in shaft rotational speed. This allows the rotation speed to be controlled within a relatively narrow range.

US Patent:

20160201744, Jul 14, 2016

Filed:

Dec 31, 2015

Appl. No.:

14/986338

Inventors:

- Walla Walla WA, US
Lee A. Perkins - Lowden WA, US
Craig B. Nelson - Walla Walla WA, US
Riley D. Greenwood - Walla Walla WA, US

International Classification:

F16D 57/02
F16D 57/00

Abstract:

A rotational speed control device includes a housing containing a viscous fluid, a shaft disposed in the housing and rotatable relative to the housing, a hub assembly secured to the shaft for rotation with the shaft, and a rotor coupled with the shaft by a frictional engagement with the hub assembly. A spring is disposed in the housing and acts on the rotor to bias the rotor axially on the shaft in a low torque direction. A braking torque between the rotor and the housing is varied according to an axial position of the rotor on the shaft.